PocketPlay
中文
Image Compare
Compare two images with a before/after slider, side by side, onion skin or a pixel difference view that reports how much changed.
Before / image A
After / image B
Add two images to compare them.
Channel values closer than this count as identical.
The two images have different sizes, so both are scaled into one canvas before comparing.
How to compare two images
- Drop the original into Before and the edited version into After — both are decoded locally.
- Choose a view: drag the slider over the seam, put them side by side, fade between them with onion skin, or switch to difference to see exactly which pixels changed.
- Read the percentage of differing pixels, tune the tolerance to ignore compression noise, and download the current view as a PNG.
FAQ
The images are different sizes — does that work?
Yes. Both are scaled to fit one shared canvas sized to the larger image, so the comparison stays aligned. For a pixel-exact diff, use two images of the same dimensions.
Why does difference mode light up everywhere on a JPEG?
JPEG re-compression changes almost every pixel slightly. Raise the tolerance to around 8–12 to ignore that noise and see only the real edits.
What does "pixels differing" mean?
The share of pixels where at least one RGB channel differs by more than the tolerance. 0% means the two images are identical within that tolerance.